Thomas harold durrans



- 2N0 Drawing,

UNITED s ar Parana? oeu res.

THOMAS HAROLD DURRANS, F OXFORD, ENGLAND,

' CO. LIMITED, OF LONDON,

ASSIGNOR TO A. BOAKE RQBERIS & ENGLAND.

' UFACTURE 0F ORGANIC-A0115 ANI-IYDRIDS AND CHLORIDS.

- 'To all whom it may concern.

. invented Be it known that I, THOMAS HAROLD Don'- BANS, a subject of the King of Great Britis a specification.

T the joint action of chlorin and'sulfur (llOXlCl ester resulting weight. of ethylacetate,

In the manufacture of acetic anhydrid by on an acetate, there is great difficulty in bringing the substances into reaction because the acetatev does not readily absorb the chlorin and sulfur dioxid.

It has been proposed to overcome the difficulty by first causing the chlorin and sulfur dioxid mixing, with an anhydrous acetate, the sulfuryl chlorid thus obtained.

' The present invention is based onthe dis- 'covery that chlorin and sulfur. dioxid are I absorbed with great readiness by a mixture of w an anhydrous acetate of the alkali, or alkaline-earth. series with a body; of the folfrom the union of an alcohol, or a phenol, with an organic acid, these being compounds of carbon, hydrogen and oxygen only; an from the union of an alcohol, or a phenol with an inorganic acid; an organic oxid, or ether; a hydrocarbon; an aldehyde; a phenol, or an acetal.

The proportion of the substance so employed may be but small; for example, about one 'per, cent. of the weight of will be 'suflicient in the'case of .the employ merit of," for instance, tri-cresyl-phosphate as the said substance.

As an example of how thisinvention carried into efi'ect I give the following to wliich 'however I do not limit myself.

One hundred parts by weight of an anhydrous alkali acetate, alkaline earth acetate,

may

and one part by gether and placed in a vessel capable of belng closed, and provided with means for the Specification of Letters Patent.

'duced. manner to the foregoing.

to react inacetic'anhydrid and then' the acetate or of an anhydrous are well mixed to- Patented nee. 23, 1919.

Application filed July 10, 1918. Serial No. 244,299.

introduction of the chlorin and sulfur dioxid and the passage thereof into, or over, the contents of the vessel. It is advantageous to cool the said vessel during the operation, but this is not essential. When the calculated quantity, or t-hereabout, of the mixed chlorin'and sulfur dioxid necessary for producing acetic anhydrid has been absorbed the acetic anhydrid 'so produced can be separated from the mixture by distillation, or other suitable means.

y suitably adjusting the proportion of chlorin absorbed acetyl chlorid can be pro- This can be effected in a similar The invention can be applied, in a similar Way, to the production of other organic acid anhydrids and organic acid chlorids. For instance :-Phenyl acetic anhydrid can be produced from anhydrous sodium phenyl acetate; or butyric anhydrid can be produced from anhydrous sodium butyrate; or benzoyl chlorid can be produced from anhydrous sodium benzoate and so on.

I do not, under this application, make any claim to the manufacture, or production, of sulfuryl chlorid as claimed under my a plication for patent Serial No. 237106, A. D. 1918.

What I claim is 1. In a process of making organic acid derivatives, the step of reacting chlorin and sulfur dioxid with tate and a body action.

2. In a process of making organic acid derivatives, the 'step of reacting chlorin and sulfur dioxid with a mixture of anhydrous alkali acetate and a body adapted to promote the reaction.

a mixture of alkali aceadapted to promote the re- In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS HAROLD DURRAN S.

Witnesses:

. PER Y J. PALMER, J. BOWELL SHAY. 

